You might be asking why John Oliver used the analogy of “a back mole” to describe Donald Trump. Oliver explained the reason – “It may have seemed harmless a year ago, but now that it has gotten frighteningly bigger it is no longer wise to ignore it.”

Oliver claims to understand why Trump’s supporters like him, as Trump is unpredictable and entertaining and could be seen as a “protest candidate.” For Oliver, though, “Donald Trump can seem appealing until you take a closer look, much like a lunch buffet at a strip club — or the NFL.”

Oliver is in a unique position to critique Trump as the current Republican front runner tweeted that he had turned down an invitation to appear on the “very boring and low rated” show, Last Week Tonight, because it was a “waste of time and energy.” However, according to Oliver, no one on his staff has ever invited Trump to be on the show, because it’s not a talk show.